The correct answer is to enable sticky sessions (session affinity) on the ALB target group. This configuration ensures that all requests from a user’s session are routed to the same SAP Web Dispatcher instance, preventing session data from being lost when the load balancer distributes traffic across multiple instances. Without sticky sessions, the ALB may send subsequent requests to a different Web Dispatcher, which lacks the user’s session context, causing the frequent drops during peak hours. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding of how stateless load balancing interacts with stateful SAP components—a common trap is assuming that simply scaling out instances or disabling cross-zone load balancing will fix session persistence. Remember the mnemonic “Stick to the same Dispatcher” to recall that session affinity ties the user to one backend, eliminating drops.
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An SAP system is deployed across multiple Availability Zones using an Application Load Balancer (ALB) for the SAP Web Dispatcher. Users report that sessions are frequently dropped during peak hours. Which configuration change should resolve this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable sticky sessions (session affinity) on the ALB target group.
Option B is correct: Enabling sticky sessions (session affinity) on the ALB ensures that a user's requests are sent to the same Web Dispatcher instance, preventing session loss. Option A is wrong because increasing the number of instances without sticky sessions may still cause drops. Option C is wrong because disabling cross-zone load balancing may reduce capacity. Option D is wrong because enabling deletion protection is for accidental deletion, not session persistence.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Disable cross-zone load balancing on the ALB.
Why it's wrong here
Disabling cross-zone load balancing reduces capacity and may worsen issue.
✗
Increase the number of Web Dispatcher instances in each Availability Zone.
Why it's wrong here
More instances may help with load but not session persistence.
✗
Enable deletion protection on the ALB.
Why it's wrong here
Deletion protection prevents accidental deletion, not session drops.
✓
Enable sticky sessions (session affinity) on the ALB target group.
Why this is correct
Sticky sessions ensure requests from a user go to the same instance.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PAS-C01 NAT questions on configuration and troubleshooting.
Technology — This question tests Technology — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Enable sticky sessions (session affinity) on the ALB target group. — Option B is correct: Enabling sticky sessions (session affinity) on the ALB ensures that a user's requests are sent to the same Web Dispatcher instance, preventing session loss. Option A is wrong because increasing the number of instances without sticky sessions may still cause drops. Option C is wrong because disabling cross-zone load balancing may reduce capacity. Option D is wrong because enabling deletion protection is for accidental deletion, not session persistence.
What should I do if I get this PAS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PAS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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